Permanent smoothness: Non-hygroscopic feature make it retain smoothness surface without any burr after years of use. The polyester wire don’t abrasion the branches and leaves and fruit of grape, which play a positive role in protecting the supported visor curtain and avoid the abrasion to the visor curtain.   http://www.judin-line.com/Permanent smoothness: Non-hygroscopic feature make it retain smoothness surface without any burr after years of use. The polyester wire don’t abrasion the branches and leaves and fruit of grape, which play a positive role in protecting the supported visor curtain and avoid the abrasion to the visor curtain.   http://www.judin-line.com/Permanent smoothness: Non-hygroscopic feature make it retain smoothness surface without any burr after years of use. The polyester wire don’t abrasion the branches and leaves and fruit of grape, which play a positive role in protecting the supported visor curtain and avoid the abrasion to the visor curtain.   http://www.judin-line.com/